John C. Worsley (![[info]](http://l-stat.livejournal.com/img/userinfo.gif){kind=small} lx) wrote,@ 2009-06-06 01:51:00 |
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| Current mood: | activate/entrances. |
| Current music: | Haujobb - Distance. |
| Entry tags: | space pod, the moon, the sun |
Space and Time.
[...]
"Because the Sun's speed along the ecliptic varies depending on the Earth-Sun distance, the number of days that it takes the Sun to travel between each pair of solar terms varies slightly throughout the year. Each solar term is divided into three pentads (候 hou). Each pentad consists of five days (rarely six), so there are 72 pentads in a year."
